[time-nuts] Setting Time on WSPR Radio Transmitter

Bob Bownes bownes at gmail.com
Fri Jun 22 15:14:23 EDT 2018


I can heartily recommend the QRP-Labs wspr beacon kit with GPS. It pull the
time from an attached GPS module and will beacon on 2m and below. Once
assembled and configured with your callsign and the bands you want to xmit
on  it Just Plain Works. It can even provide 1pps out.

Pick the right GPS module and you get 10MHz out as well!

Bob


On Fri, Jun 22, 2018 at 2:41 PM, Brian Lloyd <brian at lloyd.aero> wrote:

> On Fri, Jun 22, 2018 at 1:27 PM, Hal Murray <hmurray at megapathdsl.net>
> wrote:
>
> >
> > brooke at pacific.net said:
> > > I'm experimenting with a WSPR beacon transmitter and part of how it
> works
> > > depends on pushing the start button at exactly  2 seconds past the
> > minute.
> >
> > What do you mean by "exactly"?
> >
>
> I think WSPR has a +/-2s window for the start of a transmission. It really
> isn't all that "exact" and certainly nothing in the way of time-nuts
> definition of accuracy.
>
> The most popular WSPR implementation runs on a PC and uses a sound-card to
> generate the baseband signal and then uses an SSB transceiver to upconvert
> to the desired output frequency. Even worst-case the standard NTP
> implementation on Windows is more than sufficient for synchronization.
>
> --
>
>
>
> Brian Lloyd
> 706 Flightline
> Spring Branch, TX 78070
> brian at lloyd.aero
> +1.210.802-8FLY (1.210.802-8359)
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